Grinding and polishing machine.



J. C. BLEVNEY n J. HAUSMAN.

GRINDING AND POLISHING MACHINE.

' APPLICATION FILED HAY 20, 1909. 980,052.

wg; Il

4 SHEETS-SHEET 1.

Patented Dec. 27, 1910.

141mm hoff/J neooeo V 0' Wm J. C.' BLEVNBY & J. IAUSMAN. GRINDING ANDPoLIsHING MAGHINB;

kAIPLIfJATION FILED HAY 20, 190B.

Patented Dee. 2,7, 1910.

4 SHEETS-SHEET Z.

J. C. BLEVNEY & J. HAUSMAN. GRINDING AND PoLIsHING MAOHINB.

APPLICATION FILED MAY Z0, 1909.

Patented Dec.l 27, 1910.

4 SHEETS-BHEBT 3.

` 14eme @Hof/maal J. C. BLEVNEY & J. HAUSMAN. GRINDING AND PoLIsHINGMACHINE APPLICATION FILED HAY 20, 1909.

Patented Dec. 27, 1910.

4 SHEETS-SHEET 4.

i il

UNITED STATES PATENT oEEIeE.

JOHNl e. BLEVNEY AND JOHN HAUSMAN, 0F NEWARK. NEW JERSEY.

Specification of Letters Patent.

Patented Dee. 27, 11.910.

Application filed May 20, 1909. Serial No. 497,331.

To all whom it may concern:

Be it known that we, JOHN C. BLEVNEY and JOHN HAUSMAN, citizens of theUnited States, and residents of Newark, county of Essex, State f NewJersey, have invented certain new and useful Improvements in Grindingand Polishing Machines, of which the following is a speclfieation.

This invention relates to improvements in grinding and polishingmachines.

The construction of the machine and` the objects thereof are fully setforth in the hereinafter description.

The invention is illustrated in the accompanying drawmgs which form partof this application, but these illustrations are examples'onl and theyare not `to be understood as 1l ustratlng the onlyV forms of myinvention.

-'vlew of a portion of a polishing machine equipped with a work-hol erfor supporting shafts or rods; Fig. 2 is a front view of the 'apparatusshown in FiO. 1- Fig. 3`is aside vlew on an enlarged scale of theWork-holder shown in Fig. 1; Fig. 4 is a front view of the same; Fig. 5is a front .view of a portion of a polishing machine equipped with awork-holdin device for small varticles Fig. 5 is a detai view of one endof th'ework holding belt viewed from the rear of the machine; Fig. G isa detail view on line G of Fig. 5; Fig. Z is a detail` view on line 7 ofFig. 5; Fig. 8 is a lan-.view of a work holder for light artic es, sucha pipe; 9 is a side view of the same; Fig. 10 is a etail view of abacking to be used behind the abrasive belt of the polishing machine;Fig. 11 is a side view of a modified form of backing to be used when-thework to lbe polished as a prominent irregular surface; Fig. 12 is afront view of the same; Fig. 13 is an end view of a form of a handoperated backing; Fig. 14 is a front or plan view of ,the same; Flg. 15is a side view of the same;

' Fig. 16 is a side'view of another modification of backing; Fig. 17 isa front view of the same5 Fig. 18 "is an end view thereof.

Referring more particularly to Figs. 1, 2, 3 and 4 of the drawinvs; thereference character 1 represents the frame of the polishin machine of atype in which an abrasive be t 2 is driven over a backing or cushioningbelt 3 by means of a pulley or in any other Y polished.

suitable manner. 4 represents a rod to be.

polished and 5 is the wogk holder, of which a sufficient number isem-plo ed, depending upon the length of the ro' or` bar to be polished.In the present instance we have shown two work holders mounted upon astationary shaft 6 which is carried by a bracket 7 secured to the frameof the machine. The ends of the shaft 6 may. be supported in ordinarybearings, not shown, provided with feet and resting in the floor, orbyany other suitable means.

Each work holder consists of a bracket 8 having an aperture 9 throughwhich the shaft 6 extends. Mounted in this bracket is a fixed skew roll10 and two additional skew rolls 11 and 12 which are adjustable in thebracket. by means of slots and bolts as shown. A shaft 13 passes throughthe brackets 8 and secured to it is a pulley 14 by means ofwhich saidshaft is drlvcn by a belt 15 from a pulley 1G secured to the shaft 17.Pivoted on the shaft 13 at the outer end of the bracket 8 is a bearing18. 19 is a shaft carried by said bearing and has at on'e end thereof aworm wheel 20 which is driven by a worm 21 on the shaft 13. The oppositeend of this shaft 19 has secured thereto a bevel gear 22. The upper endof the bearing 18 is bifureated and by the bevel gear 22.

.Secured to the shaft 23 is a skew roller 25. The bearing 18 may beadjusted 'at an angle to the bracket 8 so as to bring the skew roller 25to rest u n the rod 4 emg The skew rol er 25 is held under springpressure against. the rod 4 and the amount of tension adjustable by thefollowing mcans. A threaded rod 26 passes through a nut 27 pivoted inthe bearing 18. This rod also extends through the pivoted nut. 28 in thebracket 8. By rotatmg the rod 26the bearing 18 is moved toward or fromvthe bracket and the skew roll 25 is adjusted to suit the size of the rodor shaft 4 to be polished. An expansion sprmg 29 is located between theuut 28 and the ook nuts 30 which pulls the bearing 18 toward the workand keeps the skew roll 25 in frietioual contact with the rod beingpolished.

The operation ma be briefly stated thus: After the work hok ers aremounted on the shaft 6 the rod 4 to be polished is placed on Isanie.

and 12 are adjusted until the rod 4 comes in proper contact with theabrasive belt 2 behind which is the backing 31 which backing is shownmore clearly in detail in Fig. 10, althoughV any other suitable form .ofbacking may be used. The pivoted bearing 18 is now adjusted Aby means ofthe threaded rod 26 until the skew roll'25 rests on the rod 4. When themachine is started the abrasive belt rubs against the rod 4; andtheproportioned that the speed* of the longitu` dinal movement is low. Bythis mechanism the rod 14 is automatically rotated and movedlongitudinally so that its entire surface is brought in contact with.the.. abrasive belt 2 to automatically grind and polish the same.

In Figs. 8 and 9 I'ha've shown a simple form of work holdervfor light4shafts or tubes. In this construction the tube is marked 49. is thebaseplate which may be clamped on-or near the frame of themachine 1- by thebolt 51 ,and nut 52. A bearing 53 is secured to the base plate andcarries. a skew roller 54`and maybe adjusted by the slot of thenut 56 tobring the skew roller in'contact with the tube being ground or polished.This tube rests upon askew roller 57 and is held down thereon by thepivoted plate 58 under pressure of the sprmg 59 on the rod 51. In 'thisinstance the work being comparatively light the tube 41 is rotated bythe 'abrasive belt 2, and the skew rollers 54 and 57 being in contacttherewith will be rotated by the tube 49 andthey.

y' are so ,positioned that they will move or drive the tube 49longitudinally and transversely of the belt'to grind and polish the'entire surface thereof. The Atension of the spring 59 causes the tube,49 to be held in frictional contact with the skew rollers.

In Figs. 5to 7 inclusiveI have illustrated a Work holder where a' numberof -small artlcles, such as plates, nuts or the like, ma

be polished. `In this construction a sha 33 is mounted in the bracket 8carried by the frame of the machine and at each end of this shaft aresecured pulley supports 34 and 35. In the support 34 .is mounted avertical shaft 36 andy a horizontal shaft 37.

The latter shaft is driven from the shaft 17 by the belt 15 passing overthe pulleys 16 and 39 and through bevel gears 40 on the shafts 36 and 37the vshaft 36 is driven. Secured to the shaft 36 is a pulley 41. Thepulleysupport 3 5 carries the vert-ical shaft 42 on which is secured thepulley 43. A carrying belt 44 runs over the pulleys 41 and 43. This beltis provided with any suitable number of pins or studs or other means 38for supporting and carrying the work to be operated on.

In order to hold the articles on the carrying beltwhile being moved tothe abrasive belt we provide a channel 45 in which the carrying beltruns. One side 46 of this channel extends longitudinally. beyond theother and in front of the abrasivebelt, thus furnishing a backing forthe belt 44 at the point lof work, as more clearly shown in Figs. 6 and7. This channel is supported by arms 47 'secured to the shaft 33.

The operation is as follows: The operator stands at the end vof thechannel near the support 35 and on the far side of the machine, as shownin Fig. 5 of the drawing. As the belt 44 passes in front of him hesticks or Ahangs onto the studs 38 the articles to be polished. Theseare then carried through the channel 45 and pass the abrasive belt 2,that side 46 of the channel 45 .in front of 'the abrasive belt holdingthe carryingV belt to its work. After the articles pass beyond theabrasive belt they are removed 4 therefrom, or in some instances' theyare caused to automatically drop from the belt,

or they may be removed by any automatic means. Behind the abrasive belt2 I may use either such a backing as shown' by Fig. 10 of thev drawingor any of the backings shown in the other igures, or any 'other suit#able backing. A

Fig. 10 shows the bracket 31 to be used behind. the abrasive belt 2.Preferably it is in the form of Va plate de ending from the bracket 60which is provi ed with slots 61 so that it may be adjustably fastened onthe frame 1 of the machine by a suitablebolt or nut.

In Figs. 11 and 12 is illustrated another. form of backing where it isldesired to have the abrasivel belt- 2 yieldingly pressed at di'erentpoints to grind 'and polish uneven or irregular work. In thisconstruction the backing comprises a bracket 62 by which the backing issecured to the machine. Pivoted at 63 on the bracket is a depending armor plate `64 which carries'a per orated plate 65 through which project aplurality of spring controlled fingers or studs 66. The bracket 62 isprovided with an extension 67 which l carries a bolt-@68 whicl assesthrough an opening in the arm 64. n said bolt is ivoted a lever 69provided with a cam sur ace 70 betweenthe arm. 64 and the extension 67.A bolt 71 is threaded withy the arm 64 and abutsagainst the extension 67A spring.'.72

`on the bolt' 68 presses the arm against the cam surface 70, thepressurebeing regulated by the bolt 71. I l.

When the work is in place'ready to be operated on the lever 69 is turnedto allow the arm 64 to be operated onby the influence of the spring 72which then presses the said ariii toward the abrasive belt 2. As thework passesin front of-and against the abrasive belt 2 the studs orfingers 66 press the belt to the work, but permit it to yield to anyuneveriness in the work. The result of this is an instantaneous yieldingof the grinding pressure at a given moment by means of a highly,etiicient and adjustable mechanism.

Where it is desired lto exert a stronger :pressure by hand on a certainpartof the work we may use such a backing as illustrated in Figs. 12, 13and 14 ofthe drawings. In this construction a bracket 74 is provided towhich is pivoted at 7 5, 76 and 77 the levers 78 having a handle 79. Toeach of these levers at 90 is pivoted a rod or bolt 80 around which is acoil spring 81. Securedto these -bolts is a plate 82. The

.spring 81 normally holds the said plate pending upon tlie extent of thedepression or defect. f y

In Figs. 16,17 and 18 We have shown an other belt for use when anirregular surface of prominent depressions is being worked on. In thisconstruction we provide a supporting bracket 84 which carries a numberof corrugated spring members 85, the corrugations of which do not lie inthe same plane. These spring members furnish a yielding or cushioningaction immediately behind the abrasive belt andthe high points of thecorrugations yield readily to the difference in the surface of the workoperated on.

It might be Well to state that it is to be understood that when thebackin plates hereinabove 'described are used, t e are placed back ofthe cushionin belt 3; t at is, the belt 3 rims between the abrasive beltand the backing plates.

IIaving now described our invention, what we claim as new and desire tosecure by Letters Patent is:

1. In a machine of the class described, the

combination of an abrasive belt, means for" driving the same, a bracketmounted adjacent to the belt, workholders carried by the bracket,including skew-rolls independently adjustable relatively to each otheron said bracket, and means for rotating one of the adjustable rolls.

' 2. In a machine of the class described, an abrasive belt, means fordriving the same, backing-means adapted yieldably to press the .abrasivebelt to the work, and workholders, comprising a Guide-roll, a secondguideroll adjustable relatively thereto, and means for yieldably holdingthe article against the giiide-rolls.

3. In a machine of the class described, the combination of an abrasivebelt and means for holding the work in operative relation thereto, coin)rising three rolls, two of which are inounte( on different sides of thethird and adjustable relatively thereto, and a fourth roll yieldablyheldand adjustable with relation to said third i'oll.

4.l In a machine of the class described, the combination with anabrasive belt and means for driving the same, of work-holding means,comprising a guide-roll, additional guide-rolls adjustably mounted tomove toward and away from the first guide-roll, and a spring-pressedskew-roll adjustable angularly to the guide-rolls, and means forIdriving'sait'l skew-roll.

5. In a machine of the class described, the combination with an abrasivebelt and means for driving the same, of work-holding means comprising abracket having horizontal and vertical arms, a guide-roll mounted at thejunction of said arms, an additional guide-i'oll mounted on each of saidarms, and a skew-roll angularly adjustable with relation to theguiderolls.

Iii-a machine of the kind described, an abrasive element yieldablypressed to the work combined with means for feeding and holdingr thework adjacent to the abrasive element, comprising a rotative element andan element having means for 'pressing it yieldably to the work, the lastnamed element and the abrasive element being independently yieldable inopposite directions.

l. In a ,machine of the kind described, an abrasive element combinedwith rollers disposed to feed the,work adjacent thereto,

means for adjusting one of said rollers relatively to another andholding it lyieldaby` iii its adusted position, and means for a j ustingt e supporting means for positively driviiigsaid roller.

8. In a machine of the kind described, an abrasive element combined witha series of relatively adjustable skew rollers, means for positivelydriving one of said rollers, a threaded adjusting rod for the latter,and a s ring acting upon said rod to hold the rol er yieldablyagainstthe work.

9. In a machine of the kind described, the combination with aii abrasiveelement of a backing therefor, comprising a, movable plate, andadjustable means acting .on said plate to yieldably press the abrasiveelement to its work. a

10. In a machine of the kind described, the combination with a `flexibleabrasive element of means for holding the work adr,V jacent thereto, anda backing means adapted to engage' the abrasive element, having a-'plurality of supplemental independently with means for'pressing ityieldably towardv the abrading element and having a plurality ofindependently movable yieldable elements for engaging the abradingelement.

12. In a machine of the kind described, the combination of a flexibleabrasive element, means for feeding the same, backing means therefor,comprising a plate and springyieldably pressin the plate toward theabrading element an a plurality of in dependently movable yieldableelements carried by the late and engaging the abrasive element,. anmeans for holding the work and feeding the same in a plane transverse tothat of the movement of the abrasive element. l

13. In a machine of the kind described, the combination of a liexibleabrasive element, a pivotally supported backing plate for said element,means for pressing vthe plate yieldably toward said element, and aplurality of independently movable yieldable elements carried by theplate and projecting therefrom toward the abrasive element.

w14; In a' machine of the kind described, the combination of a flexibleyabrasive element, a pivotally-mounted backing plate therefor, a springpressing the backin plate toward the .abrasive element, means or fixingthe plate against the action of the spring,

and a plurality of inde endently movable y'feldable elements carrie bythe plate and projecting therefrom toward the abrasive element.

15, In a machine of the kind described, the combination of a liexibleabrasive element, a pivotally-mounted backing plate therefor, a springpressing the backing plate toward the abrasive element,l means forfixing the plate against the action of the spring, adjustable means forregulating the movement of the plate toward the abrasive element, and alurality of'independentlymovable yieldab e elements carried by the plateand projecting therefrom toward the abrasive element.

A 16. In a machine of the kind described, the combination of a flexibleabrasive element, a bracket having an extension, a back-v ing platepivotally connected to said bracket, a boltconnected to said extension.and hav-A ing' a spring which presses the backing plate yieldablytoward the abrasive element, a lever pivoted to said bolt and having acam surface mounted between thevextension and backing, an adjustablestop for determining the movement of the backing, and a plurality ofindependently-movable yieldable elements carried by the plate andprojecting therefrom toward the abrasive element.

In witness whereof we llave hereunto set our hands at New York, countyof New York, and State of New York, this 6th day of May, 1909.

JOHN C. BLEVNEY. n JOHN HAUSMAN. -In presence of- JoHN J. RANAGAN, iISABEL R. RICHARDS.

